@article{02150492, title = {On the number of perfect binary quadratic forms.}, journal = {Experimental Mathematics}, volume = {13}, year = {2004}, pages = {451-457}, doi = {10.1080/10586458.2004.10504554}, zbl = {1133.11310}, language = {en}, url = {http://dml.mathdoc.fr/item/02150492} }
Aicardi, Francesca. On the number of perfect binary quadratic forms.. Experimental Mathematics, Tome 13 (2004) pp. 451-457. doi : 10.1080/10586458.2004.10504554. http://gdmltest.u-ga.fr/item/02150492/